Water-motor.



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UNrTnD sTATEs PATENT OFFIOE.

PETER T. COFFIELD, OF CHICAGO, ILLINOIS.

WATER-MOTOR.

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Be it known that I, PETER T. COFFIELD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Water-Motors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in water-motors, and has for its object to provide a water-motor for driving light machinery-such, for example, as Washing-machines, sewing-machines, 850.- and which is devoid of complexity and is highly eificient in its operation.

To the foregoing ends the invention con-- sists in the construction of the piston and the valves through which the water is admitted alternately on opposite sides of the piston to impart thereto the necessary reciprocating movements.

Preceding a detail description of the invention, reference is made to the accompanying drawings, of which- Figure 1 is an elevation, partly in section, showing my improved water-motor. Fig. 2 is a section on the line a: a: of Fig. 1.

In a detail description of the invention similar reference characters indicate corresponding parts.

A designates the cylinder, which is inclosed at its ends by bonnets B, which are rigidly secured in position by a suitable number of bolts O.

F designates a piston which is divided into lnon-communicating chambers G G by a partition-wall H, chamber G being the inletchamber to opposite sides of the piston and chamber G being the exhaust-chamber for opposite sides of said piston.

E and E are hollow piston-rods connected with the opposite sides of the piston, the former being the water-inlet pipe to the chamber G and the latter being the outlet-pipe from the exhaust-chamber G, as indicated by the arrows. These piston-rods pass through suitable stu'fling-boxes D in the heads or bonnets of the cylinder, and from one of said pipes or piston-rods power is conveyed to the machine to be driven, saidpoWe'r Specication of Letters Patent.

Application lilcd NOVembeI 30, 1903. Serial No. 183.119.

Patented Dec. 12, 1905.

being converted from reciprocating movement to a rotary movement in the usual manner.

I designates a spring-carrying inlet-valve which seats in the inner sides of the piston at opposite points and has its stems K projected through the walls of the piston and fitted with coil-springs K. The ends of said springs project or lie beyond the extreme ends of the valvestems. J designates a spring-carrying exhaust-valve which seats against the outer opposite sides of the piston and which also has its stems K suitably projected and fitted with similar coil-springs K. The said valves are thrown 0H their seats by the ends of the valve-stems making contact with the cylinder-heads B B. As soon as said valves are thrown off their seats by said contact with the cylinder-heads they become balanced, the pressure on both sides of said valves being equal. The valve-springs having become compressed before the ends of the valve-stems make contact with the cylinder-heads throw said valves across to the opposite seats as soon as the valves become balanced, thereby reversing the motor. In other words, the springs impart the final movement to the valves after said valves have been given the initial movement by the ends of their stems making such contact. The source of initial power-for example, the water-enters the piston-rodE and passes into the chamber G and passes through one or the other of the openings of the valve I. As the piston is shown in Fig. 1 it is moving to the right and the valve I is unseated, so as to permit the water from the chamber G', entering on the left side of said piston, to force said piston in its travel to the right. During the movement of the piston in that direction the chamber on the right of the pis- -ton exhausts through valve J, which, it will the extreme limit of its movement to the right, the springs K on the stems of both valves will first make contact with the head or bonnet at that end of the piston and will compress and allow the valve-stems to make contact with the cylinder-heads and unseat the inlet-valve I from its seat in the righthand side of the piston and to seat the ex IOO ITO

haust-valve J in the right-hand side of the piston, and vice versa. The pressure due to the incoming water through the inlet-valve to the right-hand side of the piston will cause a complete reversal of the valves. For example, the inlet-valve I will completely seat against the left-hand side of the piston and will open on the right-hand side, and the exhaust-valve J will open on the left-hand side of the piston and will close on the right-hand side. This operation is reversed at the end of each stroke of the piston.

Having described my invention, I claim- In a water-motor, a cylinder having inclosing heads, a piston divided into two noncommunicating chambers, hollow pistonrods communicating with said chambers, balanced exhaust-valves lying on the outside of one of said chambers and seating against the PETER T. COFFIELD.

Vitnesses:

R. J. MCCARTY, C. M. THEOBALD. 

